2787804 has 48 divisors (see below), whose sum is σ = 7338240. Its totient is φ = 915120.

The previous prime is 2787781. The next prime is 2787859. The reversal of 2787804 is 4087872.

2787804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2787804² = 15543702284832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8809 + ... + 9119.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

2^2787804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2787804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3669120).

2787804 is an abundant number, since it is smaller than the sum of its proper divisors (4550436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2787804 is a wasteful number, since it uses less digits than its factorization.

2787804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 2787804 is about 1669.6718240421. The cubic root of 2787804 is about 140.7410366705.

It can be divided in two parts, 278780 and 4, that added together give a square (278784 = 528²).

The spelling of 2787804 in words is "two million, seven hundred eighty-seven thousand, eight hundred four".